Congrats on the Disco. Has it got the electric brake controller already installed? If it hasnt - make sure you get an auto electrician who know how Disco's are wired. I had to take mine back twice to be re-wired as the wiring is different.
Check out
www.aulro.com and search for electric brakes for more details.
I have a red arc controller with the remore unit.
Other things are:
1. Spare wheel winch - you must have tension on the winch when winding it up or down as it seizes without tension. So if you have to change a wheel - dont throw the puncture on in the boot and then wind it up ! Either put it back on the winch or cable tie onto the chassis.
2. I keep the refuelling error device in the glovebox as it is a pain to get to when the boot is full of gear.
3. You dont need WDH given the air suspension
4. If you have a rear camera you can lower the suspension and hitch the van on by raising the suspension when in position - commonly known as a marriage saver!!!
Other than those couple of points - just enjoy. It is a great car.